Tower



FIG. 1 is a front, top, and right side perspective view of a tower;

FIG. 2 is a back, top, and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a top view thereof.

The broken lines present in the drawings are included for the purpose of illustrating portions of the article which form no part of the claimed design. 

CLAIM The ornamental design for a tower, as shown and described. 